13
RS232 / USB connection
Data can be transferred to a PC via an RS232 or USB port. If using the
RS232 port, use the null modem cable supplied. The RS232 settings
are 38400 Baud, 8 data bits, 0 parity, 1 stop bit, no flow control
(handshake).
If using the USB port, ensure that the USB driver supplied on the
accompanying product CD has been installed
BEFORE
connecting the
instrument. Installation instructions are also to be found on the CD.
Programmes such as Megger Download Manager may be used to
download the results stored in memory. Programmes such as Microsoft
®
HyperTerminal may be used to record real time data.
Battery bar graph
This is a battery symbol on the LCD display comprising 4 pairs of
segments. The battery is monitored continuously when the instrument
is turned on. The charge remaining in the battery is shown in the table
below.
Fully charged battery
50% charged battery
Tests cannot be started, and the battery
may fail at any time.
Symbol flashes when there is not
enough charge for a test. The
instrument then turns itself off.
When mains power is present the indicator shows the battery is being
charged by animating the segments of the bar graph.
Voltage at terminals
The test voltage will default to that selected in the previous test. If the
instrument has been switched off since the previous test, the test voltage
defaults to 250 V.
If there is an external voltage greater than 50 V present, this will be
displayed regardless of changes made to the test voltage. In this case the
instrument will not perform a test. The high voltage warning indicators
flash, and the beeper sounds to warn of the hazard until the external
voltage becomes less than 50 V.
When testing, the voltage displayed is the voltage present at the test
terminals of the instrument. If the test voltage is changed, by pressing
either of the test voltage
s
and
t
buttons during a test, the new test
voltage is displayed momentarily.
After testing, the voltage displayed is the voltage present on the
terminals. To see what the voltage was immediately prior to the end on
the test, press either test voltage
s
or
t
buttons.
Timer indicator
The timer shows minutes and seconds. At the start of a test the timer
will start from zero and at the end of a test it will stop. The duration of
the last test remains on the display until another test is started.
Digital display
The digital display shows the resistance or current being measured
during a test. The
Ω
/I button toggles between the two. After a test the
